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Battery Day

Battery Day is held on February 18. This event in the second decade of the month february is annual.
18 February - Battery Day
Battery, an 18th and 19th century term for a number of capacitors or Leyden jars connected in parallel.
A battery converts chemical energy into electrical energy by a chemical reaction.
There is a battery-powered bell at Oxford University that has been continuously ringing for over 175 years. No one knows what the battery is composed of and no one wants to take the device apart in order to figure it out.
The first known battery dates back 2000 years, could produce up to 2 volts, and its use was unknown. A clay jar of a prehistoric battery holds an iron rod surrounded by a copper cylinder. When filled with vinegar or electrolytic solution, the jar produces 1.1 to 2 volts.

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